package com.blog.personalblog.util;
import cn.hutool.core.util.StrUtil;
import java.security.MessageDigest;

public class MD5Util {
    public static String MD5(String s){
        if (StrUtil.isEmpty(s) ||StrUtil.isBlank(s)) {
            return null;
        }
        char hexDigits[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
        try{
            byte[] btInput = s.getBytes();
            MessageDigest mdInst = MessageDigest.getInstance("MD5");
            mdInst.update(btInput);
            byte[] md = mdInst.digest();
            int j = md.length;
            char str[] = new char[j * 2];
            int k = 0;
            for(int i = 0; i < j; i++){
                byte byte0 = md[i];
                str[k++] = hexDigits[byte0 >>> 4 & 0xf];
                str[k++] = hexDigits[byte0 & 0xf];
            }
            return new String(str);
        } catch (Exception e){
            return null;
        }
    }
}
